mtg cards shuffle graveyard into library Beacon of Unrest Gaea's Blessing | Secret Lair

Of course, as this is an ETB trigger, you probably want to find a way to not have to pay 6 actual mana for this card, in which case it's value would increase quite a bit more

Affinity reduces all alternate or additional costs, including commander tax

Finally, we've crafted this black Traveling Chocobo card

That's a game winner

Ironically, it probably has the least exciting new cards for Commander as a whole, given the specific focus on equipment

While you could run Reanimate in all three, I doubt Lazav cares about Cosmic Epiphany as much as Octavia does, while a card like Dread Return is probably easier to cast in Sidisi